Sash-operating mechanism



Dec. 7,1926.

1,609,459 w. A. BURNHAM SASH OPERATING MECHANISM Original Filed gust 30, 1916 2 Sheets-Sheet 1 3 wuc alto;

' Dec. 7 1926;

w. A. BURNHAM SASH OPERATING MECHANISM Original Filed August 50, 1916 2 Sheets-Sheet 2 Patented Dec. 7, 1926.

WILLIAM ADDISON BURNHAM, F rsvinsson-oiv-nonson, new roan, nssrenon T0 LORD & BURNHAM COMPANY, OF invinsron-o i-nnnson, new YORK, A, con

sonsmron on new YORK.

SASH-OPERATING MEcnAnIsM.

My invention relates to, improvements in sash operating mechanism, being a divisional application of that upon which United .States Patent No. 1,388,671, issued under date of May 4, 1920. The present applie;

cation covers the rack-and-pinion devices, 1n connection with a movable roller-bearing saddle for confining the rack to the pinion in different positions taken by the rack in operation.

My invention is further explained with reference to the accompanying drawings, in which: p

Fig; 1 is a perspective view showing the sash operating mechanism applied 'toa greenhouse or other horticultural building;

Fig. 2 is a detail end view of a rack-' confining saddle, showing a rack and pinion in position therewith; p p a t Fig. 3 is a side view of the parts shown in Fig. 2;'

Fig. 4 is a section on line 44 of 3;

Fig. 5' is a detail section showing the pinion; I Fig. 6 is a sideelevation of one of the rack and pinion devices, showing also themovable roller-bearing saddle for confining the rack to the pinion in different positions taken by the rack in operation. 1 Referring to the constructionjillustrated, 10 represents a portion of the roof of a greenhouse, or other building, and 11 one of a series of ventilating sashes extendmglon i gitudinally of the structure. Also extend- 3 ing longitudinally of the buildingand contiguous to the series of sashes is an operating shaft indicated at 12, which shaft may be completely or partly rotated'by any suitable power device. such, for instance, as that shown and described in my co-pen'ding application, Ser. No. 117,608,

With the mechanism shown in Fig. 1, the I 7 relative movement of the parts. ,7 3

Carried upon pins 26, passing through the,

sashes contained in the series to beoperated.

Each of the pinions 14 is comprised of a body portion 15, having teeth trunnlons 16, shoulders 17, and is held to the shaft 12 by -set screw 18. a v

The racks 13 are so formed, in cross section, (as shown in Fig. 4) as to provide,

this application filed Novemher on the under side thereof apairof parallel,

arcshaped guides 19,- (whichrideupon the per phery of the body portion 15), and, on

their upper sides, with a pair ofparallel arcshap'edguides 20, which contact with rollers hereinafter referred to. I

Foreach of the rack and pinion devices, I provide a rack-confining saddle, indicatedin whole at 21, comprising the side-plates 22, held rigidly together, being held, attheir lower ends, with's pacing-lugs 23, and'bolts orrivets 24, A p

The upper portions of the side-plates} 22 are formed on their inner surfaces, with a plurality of interlocking spacing-lugs 25, which space apart the plates22,,and prevent upper extremities of the side-plates 22,"are rollers 27, which, are adapted" to bear upon the arc-shaped guides 20 of the;racks 13 and which further strengthen the" connection between the side plates. I,

Each of the side-plates 22 is formed with a circular orifice 28, through which the trunnions 16 of the pinion 14 are passed when the side-plates 22 and other parts are assembled, the walls of said orifice 28, in operation, bearing upon the trunnions 16 of the pinion 14, and the inner surfaces vof the side-plates adjacent said orifices being adapted to loosely bearagainst theshoule ders 17 and hold the plates in position. Thus the rack-confining saddle 21, which ,is movably mounted upon thetrunnions 16 of the pinion 14, and has limited rotary movement about the shaft 12, as an axis, always has a uniform bearing surface and adapts itself to any tangential position assumed by the rack on its pinion, in the operation of 7 tion 1'5 of the pinion and against the rollers r-ack and the teeth of the pinion.

27, respectively, and at the same time insure sufficient clearance between the teeth of the It will also be'noted that (as shown in Fig. 3), open spaces are provided between the teeth of the rack, so that whenthe racks are painted, no paint may collect between "the teeth, it having been found, in pra'ctice, :that where the racks were formed as ordinarily, without suchropenings, the'paint so collecting wouldio tten so changethe relative size of the parts so asito cause breakage of same. Racks 13 are provided with -stops 29 to liniittheir upward or'outwardiravel and prevent them from riding 'ofi their respective pinions;

' "Rotation of he shaft 12 will cause rotation of the pinions 14, causing upward or outward itravel oi the racks 13, depending on" which direction the shaft 13 is rotated,

andc'arrying therewith, and opening or clos- Ing, as the case may be,'the sashesllQ What I clairn is: f 7

'1. In adeviceo'f'the class described, the

combination with a pinion having a central opening adapting it .to be fitted upon a' shaft, and having a tooth portion and a "body portion, the latter having a rackguldingsurface, and trunnlon's, of arachbar' having "teeth adapted to mesh with the teeth of the pinion and a raised guide.- portion adapted to movably bear upon the rack-guiding surface ofithe pinion 'an-d'carry the weight ofthje bar, and a rack-confining i S plates spaced apart and having a central saddle .carriedby said pinion having antifriction bearings "to engage said rack and provided with 'open-ings "forming bearings fOf'SEl-lCl'TtItlIHllODS. v V

-' 2. In a device. ofthe class des'ci'lbed, the

combination with .a tpinion having .a central v openingadapting 1t toibe fitted upon'a shaft,

'and havinp; a tooth portion and a body porti'on, "the latter. having a rackguiding .sur-

face, and trunnions, of 4a rack-bar having :open spaces 'adaptedto engage theteeith oi".

the pinion, and a guide-portion adapted to novablv bear upon the shoulders or" thepin- 1011 and carry the weight or" the rack-bar,

and a rack-*confining saddle comprising a pairof side plates, spaced-apart, and having combination with a pinion having a central opening adapting to be fit-ted'upon a sh aft, a tooth'p'ortion and abody portion,the latand adapted itoisupport and take the weight 7 of the rack firoin said teeth, ancboni-ts upper side another guide surface pro ect1ng above the plane of the teeth to contact with said anti-friction bearings. 1

*4. In :a device of "the class d'esori'bed, the combination with a pinion having a central opening adapting it to be fittedupon ashaft, v and having a "tooth portion and body l portion, the latter having a rack-guidi'ng surface, and trunnions, of araclr confining saddle carried by said pinion comprising side plates spaced apart and having a centrai orifice forming bearings for the jtrunnions ofthe pinion, and also having anti-"friction bearings, a rack-bar having open spaces,

adapted to "engage the tee'th o'f t-he pinion and having on its underside a guidesur taoe projecting below the planeo f the teeth to contact with the "guide 'surtace 1 of the pinion and adapted to support and take the weight oithe rack from sai'd teeth, and on its upper side another guide surface =pro eating 7 above the plane oft'he teeth "to contact with said anti-'frictionbearings.

5. In a device ot the class describedfthe combination with a pinion "having a central opening adapting it to be fitted: uponwhen, and having a tooth portion and a b'o'dyporthan, the "latter having a rack-guiding surface, and'trunni'ons, of a ra'ck-confinin'gsaddle carried bysaidpinion comprising side orifice forming bearings 'for the 'trunnions of the pinion, ia'nd a lso'havinganti-friction bearings, a rack-bar having open spaces adapted to engage the teeth of "the lp'inion and having on its'under side apairofzparallel arc-shaped guides projectin-,q* below the plane ofthete'eth to contact with the guide surface or the pinionand ia'dapted to-support and take the weight of the'vra'liifrom"said teeth, and on its upp'errsideanother pair or parallel "arc-shaped guides projectingwabove the plane o fth'e teeth'to contact'withszsaid anti iriction bearings.

"6. 7111 a device o l the "class el'escribeth'ithe combination with a pinion having za'i c'entral opening adapting'it to be'iitted' upon ashaft, and having a tooth porti'on'zandfa "body portion, the latter hav'ng .a rack-guidingrsur face, and trunnions, and also means by which it maybe keyed to .iashaft, ofr'a' rackconfining saddle carried by s aid. pinion scornprising side plates spaced apart andhaving a central orifice 'fonniin'g :bearings' tor the trunnions of the pinion, and also having anti-friction bearings, a rack-har having open spaces adapted to engage the teeth of the pinion and having on its under side a pair of parallel arc-shaped guides projecting below the plane of the teeth to contact with the guide surface of the pinion and adapted ,to support and take the weight of the rack jecting above the plane of the teeth to contact with said anti-friction bearings.

WILLIAM ADDISON BURNI-IAM. 

